@types/d3-geo

property geometry

geometry: GeometryType;

property id

id?: string | number | undefined;

property properties

properties: Properties;

property features

features: FeatureType[];

property bbox

bbox?: number[] | undefined;

property crs

crs?:
    | {
          type: string;
          properties: any;
      }
    | undefined;

property geometries

geometries: GeometryType[];

property type

type: string;

method center

center: {
    (): (this: This, d: Datum, ...args: any[]) => [number, number];
    (
        center:
            | [number, number]
            | ((this: This, d: Datum, ...args: any[]) => [number, number])
    ): this;
};

• Returns the current center accessor, which defaults to a function returning [0, 0].

• Sets the circle center to the specified point [longitude, latitude] in degrees, and returns this circle generator. The center may also be specified as a function; this function will be invoked whenever a circle is generated, being passed any arguments passed to the circle generator.

method precision

precision: {
    (): (this: This, d: Datum, ...args: any[]) => number;
    (
        precision: number | ((this: This, d: Datum, ...args: any[]) => number)
    ): this;
};

• Returns the current precision accessor, which defaults to a function returning 6.

• Sets the circle precision to the specified angle in degrees, and returns this circle generator. The precision may also be specified as a function; this function will be invoked whenever a circle is generated, being passed any arguments passed to the circle generator.

method radius

radius: {
    (): (this: This, d: Datum, ...args: any[]) => number;
    (radius: number | ((this: This, d: Datum, ...args: any[]) => number)): this;
};

• Returns the current radius accessor, which defaults to a function returning 90.

• Sets the circle radius to the specified angle in degrees, and returns this circle generator. The radius may also be specified as a function; this function will be invoked whenever a circle is generated, being passed any arguments passed to the circle generator.

call signature

(this: This, d?: Datum, ...args: any[]): GeoJSON.Polygon;

• Returns a new GeoJSON geometry object of type “Polygon” approximating a circle on the surface of a sphere, with the current center, radius and precision. Any arguments are passed to the accessors.

method parallels

parallels: { (): [number, number]; (value: [number, number]): this };

• Return the standard parallels for the conic projection in degrees.

• Set the standard parallels for the conic projection in degrees and return the projection.

  Parameter value

  A two-dimensional array representing the standard parallels in degrees.

method arc

arc: (
    x: number,
    y: number,
    radius: number,
    startAngle: number,
    endAngle: number,
    anticlockwise?: boolean
) => void;

• Adds an arc to the path with center point (x, y) and radius r starting at startAngle and ending at endAngle. The arc is drawn in clockwise direction by default.

  Parameter x

  x-coordinate of arc center point.

  Parameter y

  y-coordinate of arc center point.

  Parameter radius

  Radius of arc.

  Parameter startAngle

  The starting angle of the arc, measured clockwise from the positive x axis and expressed in radians.

  Parameter endAngle

  The end angle of the arc, measured clockwise from the positive x axis and expressed in radians.

  Parameter anticlockwise

  Optional boolean flag, if true the arc is drawn counter-clockwise between the two angles.

method beginPath

beginPath: () => void;

• Start a new path by emptying the list of sub-paths.

method closePath

closePath: () => void;

• Causes the point of the pen to move back to the start of the current sub-path. It tries to draw a straight line from the current point to the start. If the shape has already been closed or has only one point, this function does nothing.

method lineTo

lineTo: (x: number, y: number) => void;

• Connects the last point in the sub-path to the x, y coordinates with a straight line (but does not actually draw it).

  Parameter x

  The x-coordinate for the end of the line.

  Parameter y

  The y-coordinate for the end of the line.

method moveTo

moveTo: (x: number, y: number) => void;

• Move the starting point of a new sub-path to the (x, y) coordinates.

  Parameter x

  The x-coordinate for the new starting point.

  Parameter y

  The y-coordinate for the new starting point.

method extent

extent: {
    (): [[number, number], [number, number]];
    (extent: [[number, number], [number, number]]): this;
};

• Returns the current minor extent, which defaults to ⟨⟨-180°, -80° - ε⟩, ⟨180°, 80° + ε⟩⟩.

• Sets the major and minor extents of this graticule.

  Parameter extent

  Extent to use for major and minor extent of graticule.

method extentMajor

extentMajor: {
    (): [[number, number], [number, number]];
    (extent: [[number, number], [number, number]]): this;
};

• Returns the current major extent, which defaults to ⟨⟨-180°, -90° + ε⟩, ⟨180°, 90° - ε⟩⟩.

• Sets the major extent of this graticule.

  Parameter extent

  Major extent of graticule.

method extentMinor

extentMinor: {
    (): [[number, number], [number, number]];
    (extent: [[number, number], [number, number]]): this;
};

• Returns the current minor extent, which defaults to ⟨⟨-180°, -80° - ε⟩, ⟨180°, 80° + ε⟩⟩.

• Sets the minor extent of this graticule.

  Parameter extent

  Minor extent of graticule.

method lines

lines: () => GeoJSON.LineString[];

• Returns an array of GeoJSON LineString geometry objects, one for each meridian or parallel for this graticule.

method outline

outline: () => GeoJSON.Polygon;

• Returns a GeoJSON Polygon geometry object representing the outline of this graticule, i.e. along the meridians and parallels defining its extent.

method precision

precision: { (): number; (angle: number): this };

• Returns the current precision, which defaults to 2.5°.

• Sets the precision for this graticule, in degrees.

  Parameter angle

  Precision in degrees.

method step

step: { (): [number, number]; (step: [number, number]): this };

• Returns the current minor step, which defaults to ⟨10°, 10°⟩.

• Sets the major and minor step for this graticule

  Parameter step

  Major and minor step to use for this graticule.

method stepMajor

stepMajor: { (): [number, number]; (step: [number, number]): this };

• Returns the current major step, which defaults to ⟨90°, 360°⟩.

• Sets the major step for this graticule.

  Parameter step

  Major step.

method stepMinor

stepMinor: { (): [number, number]; (step: [number, number]): this };

• Returns the current major step, which defaults to ⟨10°, 10°⟩.

• Sets the minor step for this graticule.

  Parameter step

  Minor step.

call signature

(): GeoJSON.MultiLineString;

• Returns a GeoJSON MultiLineString geometry object representing all meridians and parallels for this graticule.

method angle

angle: { (): number; (angle: number): this };

• Returns the projection’s current angle, which defaults to 0°.

• Sets the projection’s post-projection planar rotation angle to the specified angle in degrees and returns the projection.

  Parameter angle

  The new rotation angle of the projection.

method clipExtent

clipExtent: {
    (): [[number, number], [number, number]] | null;
    (extent: [[number, number], [number, number]]): this;
};

• Returns the current viewport clip extent which defaults to null.

• Sets the projection’s viewport clip extent to the specified bounds in pixels and returns the projection. The extent bounds are specified as an array [[x₀, y₀], [x₁, y₁]], where x₀ is the left-side of the viewport, y₀ is the top, x₁ is the right and y₁ is the bottom. If extent is null, no viewport clipping is performed.

method fitExtent

fitExtent: (
    extent: [[number, number], [number, number]],
    object:
        | ExtendedFeature
        | ExtendedFeatureCollection
        | GeoGeometryObjects
        | ExtendedGeometryCollection
) => this;

• Sets the projection’s scale and translate to fit the specified GeoJSON object in the center of the given extent. The extent is specified as an array [[x₀, y₀], [x₁, y₁]], where x₀ is the left side of the bounding box, y₀ is the top, x₁ is the right and y₁ is the bottom. Returns the projection.

method fitSize

fitSize: (
    size: [number, number],
    object:
        | ExtendedFeature
        | ExtendedFeatureCollection
        | GeoGeometryObjects
        | ExtendedGeometryCollection
) => this;

• A convenience method for projection.fitExtent where the top-left corner of the extent is [0, 0].

method invert

invert: (point: [number, number]) => [number, number] | null;

• Returns a new array [longitude, latitude] in degrees representing the unprojected point of the given projected point. May return null if the specified point has no defined projected position, such as when the point is outside the clipping bounds of the projection.

  Parameter point

  The projected point, specified as a two-element array [x, y] (typically in pixels).

method postclip

postclip: {
    (): (stream: GeoStream) => GeoStream;
    (postclip: (stream: GeoStream) => GeoStream): this;
};

• Returns the current cartesian clipping function. Post-clipping occurs on the plane, when a projection is bounded to a certain extent such as a rectangle.

• Sets the projection’s cartesian clipping to the specified function and returns the projection.

  Parameter postclip

  A cartesian clipping function. Clipping functions are implemented as transformations of a projection stream. Post-clipping operates on planar coordinates, in pixels.

method reflectX

reflectX: { (): boolean; (reflect: boolean): this };

• Returns true if x-reflection is enabled, which defaults to false.

• Sets whether or not the x-dimension is reflected (negated) in the output.

  Parameter reflect

  true = reflect x-dimension, false = do not reflect x-dimension.

method reflectY

reflectY: { (): boolean; (reflect: boolean): this };

• Returns true if y-reflection is enabled, which defaults to false.

• Sets whether or not the y-dimension is reflected (negated) in the output.

  This is especially useful for transforming from standard spatial reference systems, which treat positive y as pointing up, to display coordinate systems such as Canvas and SVG, which treat positive y as pointing down.

  Parameter reflect

  true = reflect y-dimension, false = do not reflect y-dimension.

method scale

scale: { (): number; (scale: number): this };

• Returns the current scale factor.

  The scale factor corresponds linearly to the distance between projected points; however, absolute scale factors are not equivalent across projections.

• Sets the projection’s scale factor to the specified value and returns the projection. The scale factor corresponds linearly to the distance between projected points; however, absolute scale factors are not equivalent across projections.

  Parameter scale

  Scale factor to be used for the projection.

method translate

translate: { (): [number, number]; (point: [number, number]): this };

• Returns the current translation offset. The translation offset determines the pixel coordinates of the projection’s center.

• Sets the projection’s translation offset to the specified two-element array [tx, ty] and returns the projection. The translation offset determines the pixel coordinates of the projection’s center.

  Parameter point

  A two-element array [tx, ty] specifying the translation offset.

call signature

(point: [number, number]): [number, number] | null;

• Returns a new array [x, y] (typically in pixels) representing the projected point of the given point. The point must be specified as a two-element array [longitude, latitude] in degrees. May return null if the specified point has no defined projected position, such as when the point is outside the clipping bounds of the projection.

  Parameter point

  A point specified as a two-dimensional array [longitude, latitude] in degrees.

method area

area: (object: DatumObject) => number;

• Returns the projected planar area (typically in square pixels) for the specified GeoJSON object. Point, MultiPoint, LineString and MultiLineString geometries have zero area. For Polygon and MultiPolygon geometries, this method first computes the area of the exterior ring, and then subtracts the area of any interior holes. This method observes any clipping performed by the projection; see projection.clipAngle and projection.clipExtent. This is the planar equivalent of d3.geoArea.

  Parameter object

  An object for which the area is to be calculated.

method bounds

bounds: (object: DatumObject) => [[number, number], [number, number]];

• Returns the projected planar bounding box (typically in pixels) for the specified GeoJSON object. The bounding box is represented by a two-dimensional array: [[x₀, y₀], [x₁, y₁]], where x₀ is the minimum x-coordinate, y₀ is the minimum y-coordinate, x₁ is maximum x-coordinate, and y₁ is the maximum y-coordinate.

  This is handy for, say, zooming in to a particular feature. (Note that in projected planar coordinates, the minimum latitude is typically the maximum y-value, and the maximum latitude is typically the minimum y-value.) This method observes any clipping performed by the projection; see projection.clipAngle and projection.clipExtent. This is the planar equivalent of d3.geoBounds.

  Parameter object

  An object for which the bounds are to be calculated.

method centroid

centroid: (object: DatumObject) => [number, number];

• Returns the projected planar centroid (typically in pixels) for the specified GeoJSON object. This is handy for, say, labeling state or county boundaries, or displaying a symbol map. For example, a noncontiguous cartogram might scale each state around its centroid. This method observes any clipping performed by the projection; see projection.clipAngle and projection.clipExtent. This is the planar equivalent of d3.geoCentroid.

  Parameter object

  An object for which the centroid is to be calculated.

method context

context: { <C extends GeoContext>(): C; (context: GeoContext): this };

• Returns the current render context which defaults to null.

  Use the generic to cast the return type of the rendering context, if it is known for a specific application.

• sets the current render context and returns the path generator. If the context is null, then the path generator will return an SVG path string; if the context is non-null, the path generator will instead call methods on the specified context to render geometry.

method digits

digits: { (): number; (digits: number): this };

• Returns the current number of digits, which defaults to 3.

• Sets the number of fractional digits for coordinates generated in SVG path strings.

  Parameter digits

  New amount of digits

method measure

measure: (object: DatumObject) => number;

• Returns the projected planar length (typically in pixels) for the specified GeoJSON object. Point and MultiPoint geometries have zero length. For Polygon and MultiPolygon geometries, this method computes the summed length of all rings.

  This method observes any clipping performed by the projection; see projection.clipAngle and projection.clipExtent. This is the planar equivalent of d3.geoLength.

  Parameter object

  An object for which the measure is to be calculated.

method pointRadius

pointRadius: {
    (): number | ((this: This, object: DatumObject, ...args: any[]) => number);
    (
        value:
            | number
            | ((this: This, object: DatumObject, ...args: any[]) => number)
    ): this;
};

• Returns the current radius or radius accessor used to determine the radius for the display of Point and MultiPoint geometries. The default is a constant radius of 4.5.

• Sets the radius used to display Point and MultiPoint geometries to the specified number. While the radius is commonly specified as a number constant, it may also be specified as a function which is computed per feature, being passed the any arguments passed to the path generator. For example, if your GeoJSON data has additional properties, you might access those properties inside the radius function to vary the point size; alternatively, you could d3.symbol and a projection for greater flexibility.

method projection

projection: {
    <P extends GeoProjection | GeoStreamWrapper | GeoConicProjection>(): P;
    (projection: GeoProjection | GeoStreamWrapper): this;
};

• Get the current projection. The generic parameter can be used to cast the result to the correct, known type of the projection, e.g. GeoProjection or GeoConicProjection. Otherwise, the return type defaults to the minimum type requirement for a projection which can be passed into a GeoPath.

  Use the generic to cast the return type of the projection, if it is known for a specific application.

• Sets the current projection to the specified projection. The null projection represents the identity transformation: the input geometry is not projected and is instead rendered directly in raw coordinates. This can be useful for fast rendering of pre-projected geometry, or for fast rendering of the equirectangular projection.

call signature

(this: This, object: DatumObject, ...args: any[]): string | null;

• Renders the given object, which may be any GeoJSON feature or geometry object:

  + Point - a single position. + MultiPoint - an array of positions. + LineString - an array of positions forming a continuous line. + MultiLineString - an array of arrays of positions forming several lines. + Polygon - an array of arrays of positions forming a polygon (possibly with holes). + MultiPolygon - a multidimensional array of positions forming multiple polygons. + GeometryCollection - an array of geometry objects. + Feature - a feature containing one of the above geometry objects. + FeatureCollection - an array of feature objects.

  The type Sphere is also supported, which is useful for rendering the outline of the globe; a sphere has no coordinates.

  Any additional arguments are passed along to the pointRadius accessor.

  IMPORTANT: If the rendering context of the geoPath generator is null, then the geoPath is returned as an SVG path data string.

  Separate path elements are typically slower than a single path element. However, distinct path elements are useful for styling and interaction (e.g., click or mouseover). Canvas rendering (see path.context) is typically faster than SVG, but requires more effort to implement styling and interaction.

  The first generic type of the GeoPath generator used, must correspond to the "this" context bound to the function upon invocation.

  Parameter object

  An object to be rendered.

call signature

(this: This, object: DatumObject, ...args: any[]): void;

• Renders the given object, which may be any GeoJSON feature or geometry object:

  + Point - a single position. + MultiPoint - an array of positions. + LineString - an array of positions forming a continuous line. + MultiLineString - an array of arrays of positions forming several lines. + Polygon - an array of arrays of positions forming a polygon (possibly with holes). + MultiPolygon - a multidimensional array of positions forming multiple polygons. + GeometryCollection - an array of geometry objects. + Feature - a feature containing one of the above geometry objects. + FeatureCollection - an array of feature objects.

  The type Sphere is also supported, which is useful for rendering the outline of the globe; a sphere has no coordinates.

  Any additional arguments are passed along to the pointRadius accessor.

  IMPORTANT: If the geoPath generator has been configured with a rendering context, then the geoPath is rendered to this context as a sequence of path method calls and this function returns void.

  Separate path elements are typically slower than a single path element. However, distinct path elements are useful for styling and interaction (e.g., click or mouseover). Canvas rendering (see path.context) is typically faster than SVG, but requires more effort to implement styling and interaction.

  The first generic type of the GeoPath generator used, must correspond to the "this" context bound to the function upon invocation.

  Parameter object

  An object to be rendered.

method angle

angle: { (): number; (angle: number): this };

• Returns the projection’s current angle, which defaults to 0°.

• Sets the projection’s post-projection planar rotation angle to the specified angle in degrees and returns the projection.

  Parameter angle

  The new rotation angle of the projection.

method center

center: { (): [number, number]; (point: [number, number]): this };

• Returns the current center of the projection, which defaults to ⟨0°,0°⟩.

• Sets the projection’s center to the specified center, a two-element array of longitude and latitude in degrees and returns the projection. The default is ⟨0°,0°⟩.

  Parameter point

  A point specified as a two-dimensional array [longitude, latitude] in degrees.

method clipAngle

clipAngle: { (): number | null; (angle: number): this };

• Returns the current clip angle which defaults to null.

  null switches to antimeridian cutting rather than small-circle clipping.

• Sets the projection’s clipping circle radius to the specified angle in degrees and returns the projection. If angle is null, switches to antimeridian cutting rather than small-circle clipping.

method clipExtent

clipExtent: {
    (): [[number, number], [number, number]] | null;
    (extent: [[number, number], [number, number]]): this;
};

• Returns the current viewport clip extent which defaults to null.

• Sets the projection’s viewport clip extent to the specified bounds in pixels and returns the projection. The extent bounds are specified as an array [[x₀, y₀], [x₁, y₁]], where x₀ is the left-side of the viewport, y₀ is the top, x₁ is the right and y₁ is the bottom. If extent is null, no viewport clipping is performed.

method fitExtent

fitExtent: (
    extent: [[number, number], [number, number]],
    object:
        | ExtendedFeature
        | ExtendedFeatureCollection
        | GeoGeometryObjects
        | ExtendedGeometryCollection
) => this;

• Sets the projection’s scale and translate to fit the specified GeoJSON object in the center of the given extent. The extent is specified as an array [[x₀, y₀], [x₁, y₁]], where x₀ is the left side of the bounding box, y₀ is the top, x₁ is the right and y₁ is the bottom. Returns the projection.

method fitHeight

fitHeight: (
    height: number,
    object:
        | ExtendedFeature
        | ExtendedFeatureCollection
        | GeoGeometryObjects
        | ExtendedGeometryCollection
) => this;

• A convenience method for projection.fitSize where the width is automatically chosen from the aspect ratio of object and the given constraint on height.

method fitSize

fitSize: (
    size: [number, number],
    object:
        | ExtendedFeature
        | ExtendedFeatureCollection
        | GeoGeometryObjects
        | ExtendedGeometryCollection
) => this;

• A convenience method for projection.fitExtent where the top-left corner of the extent is [0, 0].

method fitWidth

fitWidth: (
    width: number,
    object:
        | ExtendedFeature
        | ExtendedFeatureCollection
        | GeoGeometryObjects
        | ExtendedGeometryCollection
) => this;

• A convenience method for projection.fitSize where the height is automatically chosen from the aspect ratio of object and the given constraint on width.

method invert

invert: (point: [number, number]) => [number, number] | null;

• Returns a new array [longitude, latitude] in degrees representing the unprojected point of the given projected point. May return null if the specified point has no defined projected position, such as when the point is outside the clipping bounds of the projection.

  Parameter point

  The projected point, specified as a two-element array [x, y] (typically in pixels).

method postclip

postclip: {
    (): (stream: GeoStream) => GeoStream;
    (postclip: (stream: GeoStream) => GeoStream): this;
};

• Returns the current cartesian clipping function. Post-clipping occurs on the plane, when a projection is bounded to a certain extent such as a rectangle.

• Sets the projection’s cartesian clipping to the specified function and returns the projection.

  Parameter postclip

  A cartesian clipping function. Clipping functions are implemented as transformations of a projection stream. Post-clipping operates on planar coordinates, in pixels.

method precision

precision: { (): number; (precision: number): this };

• Returns the projection’s current resampling precision which defaults to square root of 0.5. This value corresponds to the Douglas–Peucker distance.

• Sets the threshold for the projection’s adaptive resampling to the specified value in pixels and returns the projection. This value corresponds to the Douglas–Peucker distance.

  Parameter precision

  A numeric value in pixels to use as the threshold for the projection’s adaptive resampling.

method preclip

preclip: {
    (): (stream: GeoStream) => GeoStream;
    (preclip: (stream: GeoStream) => GeoStream): this;
};

• Returns the current spherical clipping function. Pre-clipping occurs in geographic coordinates. Cutting along the antimeridian line, or clipping along a small circle are the most common strategies.

• Sets the projection’s spherical clipping to the specified function and returns the projection. Pre-clipping occurs in geographic coordinates. Cutting along the antimeridian line, or clipping along a small circle are the most common strategies.

  Parameter preclip

  A spherical clipping function. Clipping functions are implemented as transformations of a projection stream. Pre-clipping operates on spherical coordinates, in radians.

method reflectX

reflectX: { (): boolean; (reflect: boolean): this };

• Returns true if x-reflection is enabled, which defaults to false.

• Sets whether or not the x-dimension is reflected (negated) in the output.

  Parameter reflect

  Whether or not the x-dimension is reflected (negated) in the output.

method reflectY

reflectY: { (): boolean; (reflect: boolean): this };

• Returns true if y-reflection is enabled, which defaults to false.

• Sets whether or not the y-dimension is reflected (negated) in the output.

  Parameter reflect

  Whether or not the y-dimension is reflected (negated) in the output.

method rotate

rotate: {
    (): [number, number, number];
    (angles: [number, number] | [number, number, number]): this;
};

• Returns the current rotation [lambda, phi, gamma] specifying the rotation angles in degrees about each spherical axis. (These correspond to yaw, pitch and roll.) which defaults [0, 0, 0].

• Sets the projection’s three-axis rotation to the specified angles, which must be a two- or three-element array of numbers.

  Parameter angles

  A two- or three-element array of numbers [lambda, phi, gamma] specifying the rotation angles in degrees about each spherical axis. (These correspond to yaw, pitch and roll.) If the rotation angle gamma is omitted, it defaults to 0.

method scale

scale: { (): number; (scale: number): this };

• Returns the current scale factor; the default scale is projection-specific.

  The scale factor corresponds linearly to the distance between projected points; however, absolute scale factors are not equivalent across projections.

• Sets the projection’s scale factor to the specified value and returns the projection. The scale factor corresponds linearly to the distance between projected points; however, absolute scale factors are not equivalent across projections.

  Parameter scale

  Scale factor to be used for the projection; the default scale is projection-specific.

method translate

translate: { (): [number, number]; (point: [number, number]): this };

• Returns the current translation offset which defaults to [480, 250] and places ⟨0°,0°⟩ at the center of a 960×500 area. The translation offset determines the pixel coordinates of the projection’s center.

• Sets the projection’s translation offset to the specified two-element array [tx, ty] and returns the projection. The translation offset determines the pixel coordinates of the projection’s center. The default translation offset places ⟨0°,0°⟩ at the center of a 960×500 area.

  Parameter point

  A two-element array [tx, ty] specifying the translation offset. The default translation offset of defaults to [480, 250] places ⟨0°,0°⟩ at the center of a 960×500 area.

call signature

(point: [number, number]): [number, number] | null;

• Returns a new array [x, y] (typically in pixels) representing the projected point of the given point. The point must be specified as a two-element array [longitude, latitude] in degrees. May return null if the specified point has no defined projected position, such as when the point is outside the clipping bounds of the projection.

  Parameter point

  A point specified as a two-dimensional array [longitude, latitude] in degrees.

method invert

invert: (x: number, y: number) => [number, number];

• Inverts the projected point [x, y] in unitless coordinates, returning an unprojected point in spherical coordinates [lambda, phi] in radians.

  Parameter x

  x-coordinate (unitless).

  Parameter y

  y-coordinate (unitless).

call signature

(lambda: number, phi: number): [number, number];

• Projects the specified point [lambda, phi] in radians, returning a new point [x, y] in unitless coordinates.

  Parameter lambda

  Spherical lambda coordinate in radians.

  Parameter phi

  Spherical phi coordinate in radians.

method invert

invert: (point: [number, number]) => [number, number];

• Returns a new array [longitude, latitude] in degrees representing the point of the given rotated point; the inverse of rotation.

  Parameter point

  The rotated point must be specified as a two-element array [longitude, latitude] in degrees.

call signature

(point: [number, number]): [number, number];

• Returns a new array [longitude, latitude] in degrees representing the rotated point of the given point.

  Parameter point

  The point must be specified as a two-element array [longitude, latitude] in degrees.

property type

type: 'Sphere';

• Sphere geometry type

method lineEnd

lineEnd: () => void;

• Indicates the end of a line or ring. Within a polygon, indicates the end of a ring. Unlike GeoJSON, the redundant closing coordinate of a ring is not indicated via point, and instead is implied via lineEnd within a polygon.

method lineStart

lineStart: () => void;

• Indicates the start of a line or ring. Within a polygon, indicates the start of a ring. The first ring of a polygon is the exterior ring, and is typically clockwise. Any subsequent rings indicate holes in the polygon, and are typically counterclockwise.

method point

point: (x: number, y: number, z?: number) => void;

• Indicates a point with the specified coordinates x and y (and optionally z). The coordinate system is unspecified and implementation-dependent; for example, projection streams require spherical coordinates in degrees as input. Outside the context of a polygon or line, a point indicates a point geometry object (Point or MultiPoint). Within a line or polygon ring, the point indicates a control point.

  Parameter x

  x-coordinate of point.

  Parameter y

  y-coordinate of point.

  Parameter z

  Optional z-coordinate of point.

method polygonEnd

polygonEnd: () => void;

• Indicates the end of a polygon.

method polygonStart

polygonStart: () => void;

• Indicates the start of a polygon. The first line of a polygon indicates the exterior ring, and any subsequent lines indicate interior holes.

method sphere

sphere: () => void;

• Indicates the sphere (the globe; the unit sphere centered at ⟨0,0,0⟩).

method stream

stream: (stream: GeoStream) => GeoStream;

• Returns a projection stream for the specified output stream. Any input geometry is projected before being streamed to the output stream. A typical projection involves several geometry transformations: the input geometry is first converted to radians, rotated on three axes, clipped to the small circle or cut along the antimeridian, and lastly projected to the plane with adaptive resampling, scale and translation.

  Parameter stream

  An input stream

method lineEnd

lineEnd: (this: this & { stream: GeoStream }) => void;

• Indicates the end of a line or ring. Within a polygon, indicates the end of a ring. Unlike GeoJSON, the redundant closing coordinate of a ring is not indicated via point, and instead is implied via lineEnd within a polygon.

method lineStart

lineStart: (this: this & { stream: GeoStream }) => void;

• Indicates the start of a line or ring. Within a polygon, indicates the start of a ring. The first ring of a polygon is the exterior ring, and is typically clockwise. Any subsequent rings indicate holes in the polygon, and are typically counterclockwise.

method point

point: (
    this: this & { stream: GeoStream },
    x: number,
    y: number,
    z?: number
) => void;

• Indicates a point with the specified coordinates x and y (and optionally z). The coordinate system is unspecified and implementation-dependent; for example, projection streams require spherical coordinates in degrees as input. Outside the context of a polygon or line, a point indicates a point geometry object (Point or MultiPoint). Within a line or polygon ring, the point indicates a control point.

  Parameter x

  x-coordinate of point.

  Parameter y

  y-coordinate of point.

  Parameter z

  Optional z-coordinate of point.

method polygonEnd

polygonEnd: (this: this & { stream: GeoStream }) => void;

• Indicates the end of a polygon.

method polygonStart

polygonStart: (this: this & { stream: GeoStream }) => void;

• Indicates the start of a polygon. The first line of a polygon indicates the exterior ring, and any subsequent lines indicate interior holes.

method sphere

sphere: (this: this & { stream: GeoStream }) => void;

• Indicates the sphere (the globe; the unit sphere centered at ⟨0,0,0⟩).